Recommendations for persons at high risk: Do not eat hot dogs, cold cuts, other deli meats, or fermented or dry sausages unless they are cooked properly. Do not eat refrigerated meat spreads and pâtés.Do not eat soft cheese unless it is labeled as made with pasteurized milk. Do not eat refrigerated smoked seafood, unless it is in a cooked dish or it is canned.

September 18, 2002- The CDC announces that it is investigating an outbreak of listeriosis infections.

October 12, 2002 - Pilgrim's Pride Foods, in Franconia, Pennsylvania, recalls 27.4 million pounds of fresh and frozen ready-to-eat turkey and chicken products produced since May 1, 2002. In total, 54 illnesses, eight deaths, and three fetal deaths are reported in nine states.

Cantaloupes - 2011Multistate outbreak of listeria associated with cantaloupes.All of the tainted cantaloupes were grown at Jensen Farms in Granada, Colorado. They were shipped to 17 states. Cases of listeriosis have been reported in Alabama, Arkansas, California, Colorado, Illinois, Indiana, Kansas, Maryland, Missouri, Montana, Nebraska, New Mexico, North Dakota, Oklahoma, Texas, Virginia, West Virginia, Wisconsin and Wyoming. Health officials call it the deadliest food outbreak in the United States in nearly 100 years, and the third-deadliest outbreak in U.S. history.

September 12, 2011- The outbreak is announced by the CDC. A total of 15 persons infected with the outbreak have been reported from four states. All illnesses started on or after August 15, 2011.

September 14, 2011 - The FDA issues a press release to announce that Jensen Farms has issued a voluntary recall of its Rocky Ford-brand cantaloupes after being linked to a multistate outbreak of listeriosis. In total, 147 illnesses and 33 deaths are reported in 28 states.

September 26, 2013 - Eric and Ryan Jensen, brothers who own Jensen Farms, are taken into custody and charged with introducing tainted cantaloupe into interstate commerce.

In total, 22 illnesses and four deaths are reported in 13 states and the District of Columbia from the outbreak.

Cheese - 2013 July 3, 2013 - Crave Brothers Farmstead Cheese Company in Wisconsin recalls three types of cheeses made on or before July 1 due to possible Listeria monocytogenes contamination.

July 5, 2013 - A joint investigation by the CDC and the U.S. Food and Drug Administration indicates that cheese made by Crave Brothers Farmstead Cheese Company of Wisconsin is the likely source of this outbreak.

In total, six illnesses and one death are reported in five states.

"Hispanic-style cheeses" - 2013February 21, 2014-April 18, 2014 - The CDC reports on an outbreak that occurred between August and November 2013.

CRF Frozen Foods - 2016April 23, 2016 - CRF Frozen Foods recalls 11 of its products because of possible contamination. The outbreak is traced back to strains of Listeria that have hospitalized eight people in three states since September 13, 2013.

May 2, 2016 - CRF expands its recall to include all frozen vegetable and fruit products processed at its Pasco, Washington, facility since May 2014. This accounts for 358 products sold under 42 brands.

May 13, 2016 - To date, at least 13 additional recalls have been announced since the first two. Most of them are frozen vegetable products or contain ingredients that were part of the CRF recall.

July 15, 2016 - The CDC reports that the outbreak is over after nine cases in four states, with nine hospitalizations and three deaths.